Nichelle Nichols as Uhura and William Shatner as Captain James T. Kirk in the STAR TREK episode, 'Plato's Stepchildren.' Original air date, November 22, 1968. CBS Photo Archive / Getty Images

Star Trek is one of the world's most well-known sci-fi franchises, spanning decades in film, TV, books, games and more. While it's had its fair share of lighthearted moments (hello, Tribbles!), its vision of a more equal, peaceful human civilization has made a profound impact on real-world politics and race relations. Join the guys as they explore how a single conversation with a surprising Star Trek fan shaped the course of the show -- and the course of US culture.